How to scrape Facebook Ad Library Ad with C#

Ad Details This tutorial gets it with a short C# program and the Facebook Ad Library Ad API. Each successful call costs 1 credit; errors and not-found answers are free.

1. Get an API key

Sign in to get a key and 100 free credits, no card. Then put the key in an environment variable so it stays out of your code:

export SCRAPEIO_API_KEY="your_key_here"

2. Set up C#

dotnet new console -o scrape && cd scrape

3. Write the code

Save this as Program.cs.

using System.Text.Json;

var http = new HttpClient();
http.DefaultRequestHeaders.Add("x-api-key", Environment.GetEnvironmentVariable("SCRAPEIO_API_KEY"));
var query = new Dictionary<string, string> {  };
string Url() => "https://scrapeio.com/v1/facebook/adLibrary/ad" + "?" + string.Join("&", query.Select(p => $"{p.Key}={Uri.EscapeDataString(p.Value)}"));

var json = await http.GetStringAsync(Url());
var data = JsonDocument.Parse(json).RootElement.GetProperty("data");
Console.WriteLine(JsonSerializer.Serialize(data, new JsonSerializerOptions { WriteIndented = true }));

4. Run it

dotnet run

The response has the same envelope on every endpoint: success, cached, credits_used, credits_remaining and data. Shared fields such as handle, followers, plays, likes and created_at have the same names on every platform.

Parameters

Name	Type	Description
`id`	string	Facebook Ad Id
`url`	string	Facebook Ad URL
`get_transcript`	boolean	Transcription is opt-in via gettranscript=true.
`trim`	boolean	Set to true for a trimmed down version of the response
`cache_max_age`	1d, 3d, 7d, 14d, 30d	If we have a response in the cache that is this many days old or newer, return the cached response (0 credits, with "cached": true and a "ca

Errors and what you pay

Status	Meaning	Charged
`200`	Success	Yes, unless cached
`400`	A parameter is missing or wrong	No
`401`	The key is missing or invalid	No
`402`	Not enough credits	No
`403`	The account or post is private	No
`404`	Not found on the platform	No
`429`	More than 300 requests a minute	No
`502`	Every source is down; retry shortly	No

Same endpoint in other languages

Python · Node.js · JavaScript · TypeScript · Go · Rust · Java · PHP · Ruby · Kotlin · Swift · R

Prefer no code?

Connect the MCP server to Claude Code, Cursor or Codex and ask in plain English. The agent uses call_endpoint with path /v1/facebook/adLibrary/ad for you.

100 free credits, no card. Credits never expire.

Get API key